DNS Blacklist

  • Thread starter Thread starter Jaz
  • Start date Start date
J

Jaz

How would I find out if our IP address in on any blacklist?

What do I do if it is on one?

Thanks,
Jasper
 
Jaz said:
How would I find out if our IP address in on any blacklist?
Click to expand...

Technically you cannot find out if it is on "any" list, since
(technically) anyone can build their own such list but you
can easily check the most famous/infamous blacklists.

Two very comprehensive web pages for checking RBL
status:

DRBCheck
http://www.moensted.dk/spam/

DECLUDE: List of All Known DNS-based Spam Databases

<http://www.declude.com/Articles.asp?ID=97>


A Perl program I use quite a bit for (regular) checking
since it doesn't require that I stop what I am doing and
go open a browser etc....

rblcheck: Home

<http://rblcheck.sourceforge.net/>


What do I do if it is on one?
Click to expand...

Depends on the list -- most have a webpage that allows
you to read how their policies and procedures but these
vary wildly from "you can't" to you merely fix the problem
and use their automatic check page to verify and cause
yourself to be removed....

But bottom line is you generally must:

Resolve the issue that got you listed.

Sometimes that is easy and you really MUST do this anyway,
such as having an "open relay".

Other times you are "listed" because you share a network
address block with other (past or present) abuses and in
this case some RBL will NEVER remove your listing.

You will be forced to either live with the situation, change
ISPs, or convince your ISP to change practices and get the
entire block issue resolved.

Most probably have to change ISP for such issues however.
(Which is good, because then the ISPs with bad practices
will lose business until they change those practices.)
 
Jaz,

Just as some added info, the Department of Defense keeps black lists as
well. However they are classified so you will not find out if you are on
their list at all. If you are on the DOD Blacklist, it is for life. Reason
DOD would put someone on the blacklist range widely. Most common are
involvement in attempting to gain access to DOD networks. Even if it wasn't
the owner of that machine, it will be blacklisted because it was compromised.
If you are on a list, I recommend changing ISP's all together and make sure
your practices are in order. DOD tracks these issues by multiple means. So, I
would imagine a proactive company or administrator would do the same.

Very Respectfully,
Allen
 
Good info!

We work with the DOD and there will be times when we have mail issues. I'll
have to check into this!

Thanks,
Jasper
 
Back
Top